Just spit-balling, I'd take the following guards last year over Rozier: Irving, Westbrook, Curry, Harden, Lillard, Oladipo, Beal, Walker, McCullom, Mitchell, Thompson, Paul, Williams, Holliday, Lowry, and Dragic. That's 16 that were pretty clearly better last year.
Bledsoe, Murray, Schroeder, Harris, Evans, Smith Jr., Teague, Rubio, Dinwiddie, Collison, Lee, Bogdonavic (Sac), Hill, Mills, Reddick, Dunn, and Rondo are all probably in a similar tier to Rozier. Some are probably better and some are probably worse. Personally, I would take Rubio, Reddick, and G Harris over Rozier too. You could make the argument for others as well.
That doesn't include "guards" like DeRozan, Booker, Simmons, Lebron, Fournier, and George.
That also doesn't include Wall, Jackson, Brogdon, Bradley, and Russell who missed close to half the games. You could make the argument that Wall is more valuable in 41 games than Rozier in 82.
In other words, I think you could argue Rozier was in the 20-30 range last year, but not top 20.